# Cat® GRADE Assistant vs GridLens Pro

The clearest difference is in-app purchases: Cat® GRADE Assistant at none against GridLens Pro's 3. Cat® GRADE Assistant also leads on iOS requirement (14.0 vs 17). GridLens Pro's advantage is update cadence (daily vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. GridLens Pro sells 3 in-app purchases, starting at $4.99 per month. Cat® GRADE Assistant asks for nothing beyond the download.

Cat® GRADE Assistant ships an update every 8 months, GridLens Pro daily. Both last shipped on October 11, 2026.

## The numbers

| Metric | Cat® GRADE Assistant | GridLens Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Daily** |
| Size | 38 MB | 3 MB |
| Requires iOS | **14.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 9+ |
| Developer | [Caterpillar Inc.](https://appshunter.io/developer/571668770) | [贺 周](https://appshunter.io/developer/1815397078) |

## What reviewers say

### Cat® GRADE Assistant

[App page](https://appshunter.io/ios/app/cat-grade-assistant/id1604853064)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GridLens Pro

[App page](https://appshunter.io/ios/app/gridlens-pro/id6766849142)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GridLens Monthly | $4.99 | per month |
| GridLens Yearly | $29.99 | per year |
| GridLens Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Cat® GRADE Assistant free?

Cat® GRADE Assistant is free to download, with no in-app purchases.

### Is GridLens Pro free?

GridLens Pro is free to download, with in-app purchases available.

### Do Cat® GRADE Assistant or GridLens Pro have ads?

Neither Cat® GRADE Assistant nor GridLens Pro shows ads.

### Which is updated more often, Cat® GRADE Assistant or GridLens Pro?

Cat® GRADE Assistant ships an update every 8 months, and GridLens Pro daily. Most recently, Cat® GRADE Assistant was updated on October 11, 2026 and GridLens Pro on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*